Matrix ring



FIG. 1 is an upper perspective view of a matrix ring;

FIG. 2 is a lower perspective view of the matrix ring of FIG. 1;

FIG. 3 is a front view of the matrix ring of FIG. 1;

FIG. 4 is a rear view of the matrix ring of FIG. 1;

FIG. 5 is a top view of the matrix ring of FIG. 1;

FIG. 6 is a bottom view of the matrix ring of FIG. 1;

FIG. 7 is a left side view of the matrix ring of FIG. 1; and,

FIG. 8 is a right side view of the matrix ring of FIG. 1.

The broken lines show portions of the matrix ring that form no part of the claimed design. 

CLAIM The ornamental design for a matrix ring, as shown and described. 